<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                <div class="button-wrapper">
                    <div class="button">{{this.currentCity}}</div>
                </div>
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                <div
                    class="button-wrapper"
                    v-for="item of hot"
                    :key="item.id"
                    @click="handleCityClick(item.name)"
                >
                    <div class="button">{{item.name}}</div>
                </div>
                </div>
            </div>
            <div
                class="area"
                v-for="(item, key) of cities"
                :key="key"
                :ref="key"
            >
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                <div
                    class="item border-bottom"
                    v-for="innerItem of item"
                    :key="innerItem.id"
                    @click="handleCityClick(innerItem.name)"
                > 
                    {{innerItem.name}}
                </div>
                </div>
            </div>
            
        </div>
    </div>
</template>



<script>
import Bscroll from 'better-scroll'
import {mapState} from 'vuex'
import {mapMutations} from 'vuex'
export default {
    name: 'CityList',
    mounted(){
        this.scroll =new Bscroll(this.$refs.wrapper)
    },
    props:{
        hot:Array,
        cities:Object,
        letter:String
    },
    watch:{
        letter(){
            if(this.letter){
                const element = this.$refs[this.letter][0]
                this.scroll.scrollToElement(element)//better-scroll自带接口
            }
        }
    },
    methods:{
        handleCityClick(city){
            this.changeCity(city)
            this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
    },
    computed:{
        ...mapState({
            currentCity:'city'
        })
    }
}
</script>



<style lang="stylus" scoped>

  .border-topbottom
    &:before
      border-color: #ccc
    &:after
      border-color: #ccc
  .border-bottom
    &:before
      border-color: #ccc
  .list
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    .title
      line-height: .54rem
      background: #eee
      padding-left: .2rem
      color: #666
      font-size: .26rem
    .button-list
      overflow: hidden
      padding: .1rem .6rem .1rem .1rem
      .button-wrapper
        float: left
        width: 33.33%
        .button
          margin: .1rem
          padding: .1rem 0
          text-align: center
          border: .02rem solid #ccc
          border-radius: .06rem
    .item-list
      .item
        line-height: .76rem
        padding-left: .2rem
</style>
